Ensure that the link you want to add has no IP interface that
is plumbed over the link.

# ifconfig interface unplumb

Add the link to the aggregation.

# dladm add-aggr -l link [-l link] [...] aggr

where link represents a data link that you
are adding to the aggregation.

Perform other tasks to modify the entire link aggregation configuration
after more data links are added.

For example, in the case of a
configuration that is illustrated in Figure 6–3, you might need to add or modify cable connections and reconfigure
switches to accommodate the additional data links. Refer to the switch documentation
to perform any reconfiguration tasks on the switch.